Apparent activation energy catalytic cycle

E is the energy span [33], and it is nothing more than the apparent activation energy of the whole catalytic cycle. It can be calculated from the combination of the TS and intermediate that maximize the relation... 

Experimental data from cracking cycles of 1 to 2 minutes at various temperatures indicate that the true activation energy for the catalytic cracking reaction is probably about 10,000 calories/mole (73). Higher apparent values of 15,000 to 20,000 calories/mole calculated from long-... 

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